Rocking-valve.



PATENTED DEC. 20, 1904.

(I 'nz eu fm' I OM R. WHITEHILL, DEGD.

M. 1;. WHITBHILL, ADMINISTRATRIX.

ROCKING VALVE- APPLICATION FILED JAN. 4, 1904. N0 MODEL M? a V mwaeov.

- UNITED STATES Patented December 20, 1904.

'PATENT OFFICE.

MARY E. WHITEHILL, or NEWBURGH, NEW YORK, ADMINISTRATRIX or ROBERT WHITEHILL, DECEASED.

ROCKING VALVE.

SPECIFICATION forming part of Letters Patent No.;77s,207, dated December 20, 1904. Original application filed October 3, 1903, Serial No. 175,548. Divided and this application filed January 4,1904. Serial No. 187,748.

To all whom it may concern."

Be it known that ROBERT WHITEHILL, deceased, late a citizen of the United States, and a resident of N ewburgh, in the countyof Orange and State of New York, did invent a new and useful Improvement in Rocking valves,

of which the following is a specification.

, This invention relates to a rocking valve, the object being to provide a valve structure which will admit of balancing the valve, and

thereby materially increasing its life and eflfiv Fig. 1 looking toward the right, and Fig. 3

is a similar view in the plane of the line- B B of Fig. 1 looking toward the right.

The valve is of tubular form and is mounted to rock in aisuitable casing or support on a central core, which is held stationary with respect to the valve movements. The valve is denoted by 1, the valve-chamber by 2, and

the Valve casing or support by3. The valveseat is denoted by 4, and the central core by 5. The central portion of the valve-wall is reduced both on its exterior and interior faces, as shown at 6 and 7, Fig. 3, while its opposite ends seat with a close rocking fit in the circular bearings 8 (see Figs. 1 and 2) at the opposite ends of the valve-casing 3. The valve-core 5 is also reduced throughout its central portion, as denoted at 9, Fig. 3, while its opposite ends fit the interior bore 10 of the tubular valve. The valve-seat is curved to correspond to the curve of the valve, and that portion of the valve which is engaged with the valve-seat is protected from steampressure tending to force it toward its seat by a portion of the periphery of the core,

which is coextensive with the extent of the valve-seat and lies directly opposite the valveseat, as shown at 11, Fig; 3. v

The valve 1 is rocked by suitable means between the seat 4: andthe projected portion 11 of the core to close and open the port 12, through which steam passes from the chamber 2 into the cylinder 13. s

The particular arrangement for holding the core 5 stationary while permittingthe valve 1 to rock is as follows: The opposite ends of the valve 1 are provided with slots 14 15, extending radially through the walls of the valve and of such extent in the direction of the circumference of the valve as to permit the valve the extreme rocking movement required. The core 5 has firmly fixed to its periphery within the slot 15 a bearing-piece 16, held in position on the core by a screw 17, the outer end of the piece 16 being curved to conform to the face of the bearing 8, in which the valve rocks, and intended to rest firmly against the bearing 8 when the parts are assembled. Diametrically opposite the piece 16 the said core 5(see Fig. 2) is provided with aradiallysliding bearingpiece 18, the Outer end of which is intended to fit against the face of the bearing 8 in the valve-casing and the inner end of which is beveled, as shown at 19,

ing-rod 21, which extends centrally through the core 5. At the opposite end of the core there is the same arrangement of stationary and radially-sliding bearing-pieces, and the clamping-rod 21 is provided at that end with a beveled-face washer 22, which under the pressure of a nut'23, engaged with a screwthread on the end of the clamping-rod 21, is forced in a direction to drive the radiallysliding bearing-piece at that end of the rod ,Fig. 1, to fit the beveled seat 20 on a clamp- I outwardly into engagement with the face of actuating mechanism. This means for holding the core rigid with respect to the valvecasing provides free access to the opposite ends of the valve from a point exterior to the valve chamber or casing and provides for the complete balancing of the valve, enabling it to be rocked with great ease and without any considerable Wear and tear.

What is claimed is 1. The combination with a valve-casing and a tubular valve mounted in the casing and provided with slots in its wall, of a core located Within the valve and core-retaining pieces extending from the core through the said slots in the valve-Wall into locking engagement with the Wall of the casing.

2. The combination With a valve-easing and a tubular valve mounted in the casing and provided with slots in its Wall, of a core located within the valve, a radially-movable retaining-piece extending through the wall of the valve into engagement with the wall 0] the casing and means for forcing the said retaining-piece into locking engagement with the wall of the casing.

3. The combination with a valve-casing and a tubular valve mounted in the casing and provided with slots in its wall, of a core located within the valve, radially-movable retaining-pieces extending through the wall of the valve, a rod extending through the core and having engagements with the radiallysliding pieces tending to crowd the pieces outwardly when the rod is moved in one direction and permitting them to move inwardly when the rod is moved in the opposite direction and means for moving the rod.

In testimony whereof I have signed my name, in presence of two witnesses, this 22d day of December, 1903.

MARY E. \VHITLEI'HLL, xldllll imist'ldtlltl of the estate ofRo/mrt IT/H.611"

MU, deceased. VVitn esses:

W. H. \VI-II'rEHILL, A. D. MCCANN. 

